Hydrofluoric Acid Properties, Molecular Formula, Applications - WorldOfChemicals

Hydrofluoric Acid Properties

Hydrofluoric Acid

Molecule 3D Structure Image
Molecule Structure Image



Hydrofluoric acid is a solution of hydrogen fluoride in water. It is a valued source of fluorine, being the precursor to numerous pharmaceuticals such as fluoxetine and diverse materials such as polytetrafluoroethylene. It is a highly corrosive acid, capable of dissolving many materials, especially oxides. The principal use of hydrofluoric acid is in organofluorine chemistry. Most high-volume inorganic fluoride compounds are prepared from hydrofluoric acid. The ability of hydrofluoric acid to dissolve metal oxides is the basis of several applications. It removes oxide impurities from stainless steel, a process called pickling, and silicon wafers in the semiconductor industry. In similar manner, it is also used to etch glass. A 5% to 9% hydrofluoric acid gel is also commonly used to etch all ceramic dental restorations to improve bonding. For similar reasons, dilute hydrofluoric acid is a component of household rust stain remover and in car washes in "wheel cleaner" compounds. Diluted hydrofluoric acid is used in the petroleum industry in a mixture with other acids in order to stimulate the production of water, oil, and gas wells specifically where sandstone is involved.

Chemical Properties

Acidity 3.17
Appearance Colorless solution
Boiling Point 105°C
CAS Number 7664-39-3
ChEBI 24061
Density 1.15 g/ml
EINECS Number 231-634-8
InChI 1/FH/h1H
Melting Point -35°C
Molar Mass 20.01g/mol
Molecular Formula HF
NFPA 704 H-4,F-0,R-2,C-COR
RTECS Number MW7875000
Related Compounds Hydrogen Fluoride
Solubility Miscible
Synonyms Fluoric Acid; Fluorhydric Acid; Hydrofluoride; Fluoridohydrogen; Hydrogen Fluoride